囲む
かこむ · kakomu · JLPT N3 · verb-godan
to surround
囲 = 囗 enclosure + 井 well: a wall that surrounds the village well
The outer box 囗 is the enclosure radical, which shows up in characters about boundaries, like 国 (country) and 園 (garden). Here it wraps around 井 (well). Sound hook: kakomu sounds like ka-COME, as in everyone come and gather around.